Ludwigia hexapetala

Perennial; hair on stem, sepals and leaves, alternating, willow-like leaves. Stems are erect, lie flat, or float on water surface. Bright yellow flowers with 5-6 petals; flowers blooms throughout summer.

Ludwigia flower

Photo credit: Bouba

  • Ludwigia flower

Plant Details


Ponds, ditches, lake margins, irrigation canals, side channels, and streams.
Mature Height:
Target Audience:
ODA Listing:
Plant Look Alikes:
Other Ludwigia species; sepals and flowers of L. hexapetala are larger than L. peploides; leaf tips of L. hexapetala have glands that look like small dark bumps and other species do not.
Plant Impacts:
Ludwigia plants have the ability to take over shallow, open water habitat, and interfere with the survival of species such as waterfowl, western pond turtles, beavers, and river otters that depend on open water to feed, travel, and reproduce. Fish are also impacted by Ludwigia. Through monitoring efforts we have observed that heavy infestations of Ludwigia can reduce the amount of dissolved oxygen in the water to levels that would result in mortality to our native fish species and aquatic invertebrates. Dense mats of Ludwigia can also reduce water flow in ditches and canals, reduce opportunity for recreational activities (e.g., swimming, canoeing, kayaking), stagnate water (which is favorable to mosquitoes), and can potentially negatively impact property values.
Plant Links:
Benton County CWMA Invasive Species Alert: Ludwigia spp. ODA Ludwigia brochure
CWMA Actions List:
education and outreach, collect data